Chrome isn't deleting flash cookies on exit

For some reason the latest stable release of Chrome (32) isn't deleting flash cookies on exit when the "keep local data only until I quit my browser" setting is enabled. This happens on Linux and Windows.

Anyone else noticed this?
Maybe a problem with the new flash v12 that's being bundled?
Or maybe it's an issue with the PPAPI plugin?

I ran a couple tests and all the cache was deleted both times. I disabled the Click & Clean extension first then enabled the "keep local data only..." setting. That's using Chrome v32 latest in x64 Linux.

That's odd. I went even further and also disabled my script control extension HTTPS SB, in case it was somehow deleting cache and cookies, and tested again. No Flash cookies or anything was left in the cache after closing on Youtube then re-opening the browser.